Review Request 129409: Fix scrolling in dock panels

[Emmanuel Pescosta]

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Thanks for debugging this issue!

I think that this approach is only a work-around instead of a real fix. 
For example if you change the icon size of the places panel the item height calculation will break.

I think that we should better use the size hint instead of the item size in KItemListContainer::updateScrollOffsetScrollBar().
In addition to m_logicalWidthHint the KItemListSizeHintResolver needs to determine the m_logicalHeightHint (min, median or max of m_maxLogicalHeightHint).

- Emmanuel Pescosta


On Nov. 16, 2016, 7:55 p.m., Elvis Angelaccio wrote:
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> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/129409/
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> (Updated Nov. 16, 2016, 7:55 p.m.)
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> Review request for Dolphin, Emmanuel Pescosta and Martin Tobias Holmedahl Sandsmark.
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> Bugs: 365968
>     https://bugs.kde.org/show_bug.cgi?id=365968
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> Repository: dolphin
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> Description
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> The reason why scrolling is smooth in the DolphinView but not in the dock panels is: https://bugs.kde.org/show_bug.cgi?id=365968#c19
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> So we just need to set a default itemSize in the KStandardItemListView constructor.
> The itemHeight is computed like in DolphinItemListView::updateGridSize().
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> Diffs
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>   src/kitemviews/kstandarditemlistview.cpp 6471002c72f7a854b54d653f5248939a7861a225 
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> Diff: https://git.reviewboard.kde.org/r/129409/diff/
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> Testing
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> Scroll is now smoot both in Places and Folders dock panels. Tested with xf86-input-libinput and xf86-input-evded drivers, and libinput on Wayland.
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> Thanks,
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> Elvis Angelaccio
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